Improvement in windlass



@citen tsttra sttrnt @Hira- WILLIA'M `(SrItAliAllI MCIVOR, OF LIVERPOOL,"ENGLAND,

' Letters Patent No. 73,360, dated January 14, 1868.

IMPROVEMENT IN WINDLASS.

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Be it known that I, WILLIAM GRAHAM McIVOR, of Liverpool, England, haveinvented anew and useful Improvement in Windlasses; and I do'herebydeclare that the following is a full, clear. and exact descriptionthereof, which will enable others skilled in the art to make and use'the same, reference being had to the accompanying drawings, forming partof this specification.

This invention consists in applying a. spring to a windlass in such amanner that as the windlass-drum is turned and the rope or chain unwoundfrom it, the spring will be wound up and rendered subservient as apower, in assisting-to wind the rope or chainfupon the windlass-drum andelevating or moving the article which, isattached to the rope or chain.The invention also consists in a novel application of gearing to ithewindlass tov wind up the rope ,or chain, whereby the spring is wound upas the rope or chain is wound upon thewindlassdrum. In the accompanyingsheet of drawings- Figure 1 is a transverse vertical section of myinvention', taken in the line x 2:, fig. 2.

Figure 2, a plan or top View of the same.

, Figure 3, a section of a portion of the same, taken in the liney y,tig. 2.

Similar letters of reference indicate corresponding parts. i

' A represents a frame or stock, in which the wiudlass is, placed, and.B represents the drum ofthe windlass,v which is hollow, and connectedwith its shaft, C, hy'means of coil-springs, D, the wire ends of thesprings being attached to the shaft C, and the outer end attached to theinner side o f' the drum B, as shown in iig. 1. To one end of this drumBthere is attached a toothed wheel, DIX, with which a holding-pawl, E.engages, as shown in figs. 1 and 2. To one end of the shaft .0, of thedrum B, there is attached a wheel, F, which is provided with two s etsof teeth, a b, one set, d, being what are common-Ly termed spr-tceth,and the other set, b, ratchet-teeth,

l two plaw1s,F FX, engaging with the latter. These pawls maybe raisedand freed from the ratchet-teeth at any time'by actuating a lever, G,arranged or applied in any proper manner. Into the teeth a, of the wheelF, i a pinion, H, gears, and this Api'nion is on the shaft of a wheel,I, which is turned by hand, and has a brake-lever, J, arranged in suchrelation with it that said levermaybe applied to the periphery of Iwhenever necessary. The windlass-drum, B, is provided with afriction-brake, K, which is operated or applied by a lever, L. M is ithe rope or chain,which is attached to the drum B, and is wound upon andunwound from it.

- The operation is as follows: Suppose, for instance, that the inventionbe applied to a ships mindless, and that .the anchor beraised, and therope or chain wound upon the drum B. In lowering the anchor, the rope or.chain M will, in turning the drum B, wind up the springs D, and thelatter will consequently serve as a power in winding the ropeor'chainM'on the drum to raise theanchor. it beingy understood that :he shaft Ciskept. stationary by thepawls FX engaging with the teeth a o wheel FfIn raising the anchor. the drum'h'B is `turned by turning the wheel I inthe direction indicated by` the arrow 1, the power being transmittedthrough the springs D, andthe power of the latter is 'thereby kept 'upand increased. In lowering the anchor, (letting out the chain or cable,)the wheel I may be turned iu the opposite direction to arrow 1, butbefore this is. done said wheel is turned a trii'ie forward, in thedirection of arrow 1, so that the pawls FX may, by actuating lever G, beraised from the teeth cof wheel F, and the'shaft C and drum B are thusboth relieved, and any quantity of chain or cable may be freely givenout, the speed of the rotation ofthe drum B being regulated by the brakeJ, and the wheel I may be entirely stopped by the brake when desired, soas to admit of the springs D being wound np under theweight of theanchor. In raising the anchor, the pawl E must be disengaged from thewheel DX, and the pawls FX-allowed t'o'engage with the teeth a of wheelI', the wheel I being turned in the direction indicated by arrow 1. lHaving described my invention, what I claim as new, and desire to secureoy Letters Patent, is'L i The application of springs to a windlass tooperate in the manner substantially :is and for the purpose lspecified.- i v v f The above speciiication of my inventionsigned by me,this day of 1867. Y i WILLIAM GRAHAM' McIVOIi.

Witnesses:

- LI. LABK, Jamas DAIsH..

